Clean up LSDA name generation and use for SJLJ exception handling. This

makes an eggregious hack somewhat more palatable. Bringing the LSDA forward
and making it a GV available for reference would be even better, but is
beyond the scope of what I'm looking to solve at this point.

Objective C++ code could generate function names that broke the previous
scheme. This fixes that.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80649 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 103 insertions, 0 deletions

diff --git a/test/CodeGen/ARM/2009-08-31-LSDA-Name.ll b/test/CodeGen/ARM/2009-08-31-LSDA-Name.ll
new file mode 100644
index 0000000..ca669e1
--- /dev/null
+++ b/test/CodeGen/ARM/2009-08-31-LSDA-Name.ll
@@ -0,0 +1,103 @@
+; RUN: llvm-as < %s | llc -march=arm -f | FileCheck %s
+
+%struct.A = type { i32* }
+
+define arm_apcscc void @"\01-[MyFunction Name:]"() {
+entry:
+  %save_filt.1 = alloca i32                       ; <i32*> [#uses=2]
+  %save_eptr.0 = alloca i8*                       ; <i8**> [#uses=2]
+  %a = alloca %struct.A                           ; <%struct.A*> [#uses=3]
+  %eh_exception = alloca i8*                      ; <i8**> [#uses=5]
+  %eh_selector = alloca i32                       ; <i32*> [#uses=3]
+  %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+  call arm_apcscc  void @_ZN1AC1Ev(%struct.A* %a)
+  invoke arm_apcscc  void @_Z3barv()
+          to label %invcont unwind label %lpad
+
+invcont:                                          ; preds = %entry
+  call arm_apcscc  void @_ZN1AD1Ev(%struct.A* %a) nounwind
+  br label %return
+
+bb:                                               ; preds = %ppad
+  %eh_select = load i32* %eh_selector             ; <i32> [#uses=1]
+  store i32 %eh_select, i32* %save_filt.1, align 4
+  %eh_value = load i8** %eh_exception             ; <i8*> [#uses=1]
+  store i8* %eh_value, i8** %save_eptr.0, align 4
+  call arm_apcscc  void @_ZN1AD1Ev(%struct.A* %a) nounwind
+  %0 = load i8** %save_eptr.0, align 4            ; <i8*> [#uses=1]
+  store i8* %0, i8** %eh_exception, align 4
+  %1 = load i32* %save_filt.1, align 4            ; <i32> [#uses=1]
+  store i32 %1, i32* %eh_selector, align 4
+  br label %Unwind
+
+return:                                           ; preds = %invcont
+  ret void
+
+lpad:                                             ; preds = %entry
+  %eh_ptr = call i8* @llvm.eh.exception()         ; <i8*> [#uses=1]
+  store i8* %eh_ptr, i8** %eh_exception
+  %eh_ptr1 = load i8** %eh_exception              ; <i8*> [#uses=1]
+  %eh_select2 = call i32 (i8*, i8*, ...)* @llvm.eh.selector.i32(i8* %eh_ptr1, i8* bitcast (i32 (...)* @__gxx_personality_sj0 to i8*), i32 0) ; <i32> [#uses=1]
+  store i32 %eh_select2, i32* %eh_selector
+  br label %ppad
+
+ppad:                                             ; preds = %lpad
+  br label %bb
+
+Unwind:                                           ; preds = %bb
+  %eh_ptr3 = load i8** %eh_exception              ; <i8*> [#uses=1]
+  call arm_apcscc  void @_Unwind_SjLj_Resume(i8* %eh_ptr3)
+  unreachable
+}
+
+define linkonce_odr arm_apcscc void @_ZN1AC1Ev(%struct.A* %this) {
+entry:
+  %this_addr = alloca %struct.A*                  ; <%struct.A**> [#uses=2]
+  %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+  store %struct.A* %this, %struct.A** %this_addr
+  %0 = call arm_apcscc  i8* @_Znwm(i32 4)         ; <i8*> [#uses=1]
+  %1 = bitcast i8* %0 to i32*                     ; <i32*> [#uses=1]
+  %2 = load %struct.A** %this_addr, align 4       ; <%struct.A*> [#uses=1]
+  %3 = getelementptr inbounds %struct.A* %2, i32 0, i32 0 ; <i32**> [#uses=1]
+  store i32* %1, i32** %3, align 4
+  br label %return
+
+return:                                           ; preds = %entry
+  ret void
+}
+
+declare arm_apcscc i8* @_Znwm(i32)
+
+define linkonce_odr arm_apcscc void @_ZN1AD1Ev(%struct.A* %this) nounwind {
+entry:
+  %this_addr = alloca %struct.A*                  ; <%struct.A**> [#uses=2]
+  %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
+  store %struct.A* %this, %struct.A** %this_addr
+  %0 = load %struct.A** %this_addr, align 4       ; <%struct.A*> [#uses=1]
+  %1 = getelementptr inbounds %struct.A* %0, i32 0, i32 0 ; <i32**> [#uses=1]
+  %2 = load i32** %1, align 4                     ; <i32*> [#uses=1]
+  %3 = bitcast i32* %2 to i8*                     ; <i8*> [#uses=1]
+  call arm_apcscc  void @_ZdlPv(i8* %3) nounwind
+  br label %bb
+
+bb:                                               ; preds = %entry
+  br label %return
+
+return:                                           ; preds = %bb
+  ret void
+}
+;CHECK: L_LSDA_1:
+
+declare arm_apcscc void @_ZdlPv(i8*) nounwind
+
+declare arm_apcscc void @_Z3barv()
+
+declare i8* @llvm.eh.exception() nounwind
+
+declare i32 @llvm.eh.selector.i32(i8*, i8*, ...) nounwind
+
+declare i32 @llvm.eh.typeid.for.i32(i8*) nounwind
+
+declare arm_apcscc i32 @__gxx_personality_sj0(...)
+
+declare arm_apcscc void @_Unwind_SjLj_Resume(i8*)